A\THi>MKI>rs.K--SAi;-.I \. .V.I 



Sarsia rosaria Haeckel. 



Coryne rosaria, AGASSIZ, L., 1862, Cent. Xat. Hist. U. S., vol. 4, p. 340. A- \ i/. \.. i Sf>;, Virrh Arm-r. Aca!., p. 176, fig 289. 



Sarsia rosaria, HAECKEL, 1879, Syst. Jer Mi .i'i CDj p. 18. 



Santa rosaria= Syncoryne rosaria, FEWKES, iSSij. Am. r. Vituralist, vol. 23, p. 597, plate 25, fig. 7; tcit-figs. 8, 9 (hydroid?). 



Syncoryne occidentals, FEWKKS, 1889, Bull. Essei Inst., Salem, vol. 21, No. 7, p. 99, plate 3, figs. 2, 3. 



( ?) Syn diclyon angulatum, Mt RUAI H and SIIK^RV.R, 1903, Proc. Zoo]. Soc. London, vol. 2, p. 168. 



Codonium apiculum, MURBACH and SHEARER, 190}, Proc. Zool. Soc. London, vol. 2, p. 165, plate 17, fig. i; plate 22, figs. 4, 5; 



1902, Annals and Ma^. Nat. Hist., scr. 7, vol. 9, p. 72. 

 Sarsia apicula+S. rosaria, HARTLAI'B, 1907, Nordischcs Plankton, Nr. 12, pp. 17, 50, figs. 9, 45. 



Bell 15 to 30 mm. high, 10 to 15 mm. wide, with fairly thick walls and small apical 

 projection. 4 equally developed, radially placed tentacles 1 .5 to 2 times as long as bell-height. 

 The basal bulbs of these tentacles are large and are flanked on either side by a large nemato- 

 cyst-pad. Each tentacle-bulb bears an abaxial ocellus. There are 4 slender, straight-edged 

 radial-canals and a narrow ring-canal. The velum is well developed. Manubrium short and 

 spindle-shaped, and mouth about at the level of the velar opening. There is a short axial 

 canal above the stomach. The gonad encircles the stomach, leaving both ends tree. N<> 

 medusa-buds. The colors are quite variable as in other species ot Sarsia. The tentacle- 

 bulbs range from yellow through red to brownish-red, and the stomach is yellow, pink, or 

 reddish-violet to purple. 



This is the most abundant Sarsia along the Pacific coast of the United States. It occurs 

 in great swarms in San Francisco Harbor in spring; and in Victoria Harbor, Puget Sound, 

 in July. 



The hydroid is Syncoryne rosaria found by A. Agassiz and Fewkes in shallow water 

 attached to piles of wharves. Each tentacle terminates in a knob, and the hydroid is a true 

 Syncoryne. 



Sarsia minima von Lendenfeld. 

 Sarsia minima, VON LENDENFELD, 1884, Proc. Linnean Soc. New South Wales, vol. 9, pp. 584, 915, plate 21, figs. 34, 35. 



Bell of medusa 3 mm. high and 2.5 mm. wide with "a long manubnum like the northern 

 Sarsia;." It is therefore readily distinguished from Sarsia radiata, which has a short manu- 

 brium. S. minima has a spindle-shaped, nearly cylindrical manubnum which extends tor 

 about half its length beyond the velar opening. The 4 marginal tentacles are somewhat 

 longer than the bell-height and are covered with rings of nematocysts. The entoderm ot 

 the stomach is pale brown, other parts colorless. 



Hydroid. The stems are 2 to 3 mm. high and arise from a creeping, slightly branched, 

 non-anastomosing hydrorhiza. The perisarc which invests the hydrorhiza and hydrocauli is 

 irregularly annulated or wavy throughout, and terminates at the bases of the hydranths in 

 a transverse margin. The hydranths are slender, spindle-shaped, 0.6 to 0.8 mm. long, and 

 with 8 to 12 irregularly scattered tentacles, all of which are knobbed at their ends. When 

 they produce buds they become stouter, and are so thickly covered by the budding medusae 

 "that nothing of their bodies remains visible." The perisarc is reddish-brown. 



This hydroid is found at Port Jackson, New South Wales, Australia, overgrowing Obclla 

 geniculata, on buoys and submerged ropes. The medusae are produced in April and May. 

 Von Lendenfeld did not obtain any mature medusae. 



Sarsia brachygaster Grbnberg. 



Sarsia brachygaster, GRONBERO, 1898, Zoolog. Jahrb., Abth. Syst., Bd. 1 1, p. 459, taf. 27, figs. 3, 4. HARTLAI n, 1907, N'or- 

 disches Plankton, Nr. 12, p. n, fig. 3. 



Bell 15 to 18 mm. high and 8 to 10 mm. wide and three-fourths-egg-shaped, the greatest 

 breadth being above the middle. 4 radially situated tentacles, each being about twice as 

 long as the bell-height. Basal bulbs of these tentacles well developed, and a single MI\ 

 small ocellus upon the outer side of each bulb. Manubrium cylindrical, and two-thirds 

 as long as height of bell-cavity. Mouth situated at extremity of a shoit cylindrical neck. 

 The gonad is tubular and surrounds the stomach. No medusa-buds. The manubrium, 

 gonads, tentacle-bulbs, and tentacles are orange-red. The ocelli are black. 



