PENNATULIDA. 



57 



Nr. 



Total length in nun. 



Length of peduncle 

 Breadth » 



Length of the spicules of the 

 calyxes in mm. 



Breadth 



Length of the spicules of the 

 tentacles in mm. 



Breadth 



Length of the polyp-calyx 



Breadth 



Number of calyx-teeth . , 



Number of longitudinal series 

 of polyps 



Nitmber of polyps in each ob- 

 lique series . 



I. 

 «/>. lofo- 



90 



0.560 

 -0.893 



0.020 

 -0.035 



0.290 

 — 0.31S 



0.020 

 —0.027 



3-5 



l(-2) 

 I( — 2)! 



2. 



■<P. 



mo/itii 



4- 

 c/*;-. ar- 



iria/inn > 



290 



0.142 

 -0.S93 



0.016 

 — 0.046 



■) 



•) 



3 

 I 



2-3 



2-3 



5- 



KoUiker's 



type of 



P. Ihom- 



soni 



145 



0.36 



— 1.05 

 0.027 



—0.066 



o.i I 



— 0.19 

 0.0 1 



—0.04 



1-5—2 

 (most often) 4 



6. 

 »: P. cari- 



215 



0.222 

 -1.023 



0.041 

 -0.055 



0.136 



0.014 



3-5 



3 



3 

 3(-4) 



230 



3-4 



3{o— 2) 



3 



3 



140 



0.992 



0.032 

 — 0.064 



0.1 18 

 —0.128 

 o.ooSo 



3—4 

 2 



3 



3 



3-4 



230 



4(2-5) 

 1-5—2 



3(0—2) 



3 

 4 



320 



0.192 

 —0.992 



0.032 

 —0.056 



0.192 



0.016 



2—4 



1.8-2 



3(0-5) 



3 



4-5 



II. 



P. 

 Gun- 

 hild(c> 



505 



157 



5 



0.592 

 —0.960 



0.032 

 —0.048 



0.128 

 —0.192 



0.016 

 —0.032 



2-4 

 i.S 



3(0-4) 

 3(-4) 



The most complete specimen is Nr. 11 from the Skager Rak, in which the whole peduncle is 

 preserved; the upper end, however, is broken off 3). The four specimens Nr. 3, 7, 8, and 10 are of especial 

 interest because their upper end is intact ; this .shows that an}' supposition that the genus Protoptllitm was 

 constructed like the Virgularise, is unwarranted; when the top is so often wanting, and the calcareous 

 a.vis appears naked for a greater or less distance, this in Protoptiluin is with tolerable certainty onh- 

 due to mutilation, generally caused b\- the fishing apparatus. In the four mentioned specimens the 

 rhachis terminates above as a longer or shorter process (fig. 4 /), bent towards the ventral side in a 

 more or less hook-like way; this process is covered with zooids to the point; the point itself may be 

 occupied by a zooid, which, however, does not appear to be larger or upon the whole built differently 

 from the others. 



No stress can be put on the differences with regard to the size of the spicules; in the first 

 place, I have by no means always measured exactly the largest and the smallest specimens, and 

 secondl\-, the measurements of the specimens of the North-x'\tlantic Expedition and of the type- 

 specimen of the .species P. tliouisoiii^ have been made by Danielssen and by Kolliker, and these 

 measurements I have not been able to control; besides, spicules are upon the whole often \ery 

 varying both in length and thickness in different individuals of the same species of Pennatulids. 



As to the colour of pohps and zooid.s, and consequenth' of the rhachis as a whole, it is also 



■) Is said to be -as in the other species . 



2) The obUque series are here most easily seeu to be such, when viewed in a direction opposite to that in the other 

 specimens, viz. from the dorsal pol^'p upwards towards the ventral median hue. 



3) This specimen was in the Riksmuseum in Stockholm labelled as <^Pr. guiiliilda:-, but the name has never been 

 published (comp. Grieg. Ovs. Norges Penn. p. 21). 



The Inorolf-Expedition. V. i. 



