OPISTHOBRANCHIATE MOLLISCA FROM MONTEKEY BAY. 125 



This species presents many marked differences from the only other recorded species of this genu?, 

 A. 2e(/andiea Alder and Hancock, and is without question distinct from it. It is here provisionally 

 identified with Cooper's Doris sanguinea, though it may prove to be different, if Cooper's original 

 specimens can ever be found. It occurs all along the coast from Monterey Bay to Point Lobos in 

 rocky tide pools and is not at all rare during the summer months. 



A specimen deposited in the U. S. National 3Iuseuni (no. ISliiTT). 



Subfamily VI, OADLININi:. 



Body somewhat depressed; notfeum granuligerous, scarcely rough; branchial leaves simply 

 jiinnate, bi- or tripinnate; tentacles short, flattened, acuminate; foot rather wide, with a deep anterior 

 marginal sulcus. Labial armature lamelliform, almost annulate, of extremely small hooks. Rhachis 

 of radula with a denticulate tooth; pleurae imiltidentate, ]ilearal teeth honked, the external margin 

 serrulate. 



Genua 7. CADLINA Bergh. 



Cadlina Bergh, On the Nudibr. Gasterop. Moll, of the North Pacific Ocean. I, Proc. Phila. .\cad. Nat. .Sci.. 1879, p. 114. 

 Die Opisthobranchien, Ball. Mus. Comp. Zool., XXV, 10, p. 168. System der Nudibr. Gasteropoden, 1892, p. 

 108. Malacol. Unters. XVIII, 1892, p. UOO. 



Glanp peni,'^ armed with a series of hooks. 



7. Cadlina marginata MacFarland. 



Cadlina marginata MacFarland, op. cit., p. K. 



Body elongate, elliptical, somewhat depressed, less abruptly rounded behind than in front. 

 Notccum firm, covered everywhere with low tubercles, each one tipijed with lemon yellow surrounded 

 by a narrow ring of white and forming the center of a clearly marked polygonal area (pi. .xxv, fig. 11). 

 General ground color everywhere clear translucent yellowish white, the tubercles tipped as above. 

 Upper and lower margins of mantle, and lateral and posterior edges of f(jot with a narrow band of 

 lemon yellow (pi. xxv, figs. 10, 12), the tips of rhinophores and branchiae and their sheaths of the 

 same color. In alcohol the light yellow color disappears and the animal becomes uniformly white. 

 Varying degrees of contraction of the not»um in death cause the mantle tubercles to Ijecome more 

 or le.ss prominent within a wide range. 



JIantle margin wide, broadly overlapping the foot everywhere except posteriorly (pi. xxv, fig. 

 111.) Foot narrow, nearly linear, tapering slightly posteriorly, in front abruptly rounded, bilabiate, 

 the upper lip notched, thin, the lower one thick and fleshy. General ventral surface everywhere 

 smooth and white, except the yellow border of foot and mantle. 



Head small, rounded, mouth a longitudinal slit, the tentacles short, triangular, flattened, auri- 

 form, with a distinct external groove. 



Khinophores small, perfoliate with 16-18 leaves, the clavus conical, inclined backward, the 

 cylindro-eunical t-talk erect, the whole organ completely retractile within a low sheath, the margin of 

 which bears low tubercules tipped with lemon yellow. 



Branchial plumes 6, bipinnate, spreading, arranged in an incomplete circle which is completed 

 behind by the anal papilla. The plumes completely retractile within a low sheath with tuberculate 

 margin, the tubercles tipped with lemon yellow. 



Dimensions of large individual: length 45 mm., width 22 mm., and height 8-10 mm. 



Pharyngeal tube cylindro-conical, 2.5 mm. long by 2 mm. wide, the pharyngeal bulb strong, 

 4 mm. long by 2.5 mm. wide by 3 mm. high, cylindro-conical, the radula sac projecting behind and 

 below as a cylindrical, roimded prominence for about 1 mm. Labial disc convex, the opening trian- 

 gular with the apex downward, the armature a broad yellow band, quadrangular below, narrowing 

 on the sides and interrupted above, its greatest width 1 mm. The elements of the armature are 

 closely set bifid hooks about 0.04 mm. in height (pi. xviii, fig. 27.) 



The broad radula has a length of 4 mm. and a width of 2 mm., with a shallow median groove. 

 The teeth are in 90 rows, of which the last 4 are undeveloped in the sheath. The dental formula is 

 47-1-47. Rhachis with a single series of teeth, erect, hooked, the tip divided into 4-6 nearly equal 

 blunt denticles (pi. xviii, fig. 28«.) 



