294 COLE 



time until now. Ives's description and figures are readily recognizable, 

 and besides being able to include the description of the male I have very 

 little to add. 



Pycnogonum stcarnsi is closely allied to P. littorak (Strom). The prin- 

 cipal differences can be seen at a glance in the following table : 



P. littorale. P. stearnsi. 



Average length of female about 15 Average length of female about 6 



mm. mm. 



Claw more than half the length of Claw less than half the length of 



the second tarsal joint. the second tarsal joint. 



A smaller conical protuberance on No protuberance on the first trunk 



the dorsal side of the first trunk segment between the one on the 



segment between the one on the posterior border and the eye 



posterior border of the segment tubercle. 



and the eye tubercle. 



Ovigera : "Along the inner margin Ovigera practically unarmed except 



of the joints extend a few very for a few small spines on the 



small and irregularly distributed outer side of the third joint. 



spines of quite a simple form " 



(Sars, '91, p. 10). 



BIBLIOGRAPHY. 



The following list includes, besides the papers referred to in the fore- 

 going pages, the principal references to North American Pycnogonida. 



BOHM, R. 



i879 a Uber die Pycnogoniden des Konigl. Zoologischen Museums zu 

 Berlin, inbesondere iiber die von S. M. S. Gazelle mitge- 

 brachten Arten. Monatsbericht der Konigl. Akademie der 

 Wissenschaften zu Berlin, 20, Taf. i, n, Februar 1879, pp. 

 170-195. 



l879 b Ueber Pycnogoniden. Sitzungsber. Gesellsch. naturforsch. 

 Freunde Berlin, pp. 140-142. 



BRUNNICH, MARTIN THRANE. 



1764 Entomologia (Copenhagen). 



COLE, LEON J. 



I90i a Notes on the Habits of Pycnogonids. Biol. Bull., vol. n, pp. 



195-207. 



I90i b On Discoarachne brevipes Hoek, a Pycnogonid from South 

 Africa. Zool. Jahrb., Abth. f. Syst.. Bd. 15, pp. 243-248, 

 Taf. 13. 



